Jee-rajunya, K. and Tepgidagarn, P. 1999. Damages Evaluation of Bt. Transgenic Cotton to Cotton Bollworm, Helicoverpa armigera (Hubner). Thai Agricultural Research Journal. 17, 1 (Mar. 1999), 57–65. DOI:https://doi.org/10.14456/thaidoa-agres.1999.7.